作者：Guorong Gao, F. Yang, F. Zhou, J. He, W. Lu, P. Xiao, H Yan, Caofeng Pan,* Tao Chen*, Zhonglin Wang*
关键字：hydrogels, ionic conductor, touch pad, self-healing, adhesiveness
论文来源：期刊
具体来源：Adv. Mater., 2020, 32, 2004290
发表时间：2020年

There is an increasing interest to develop next generation of touch pads that requires stretchability and biocompatibility to allow its integration with a human body, and even to mimic the self-healing behavior with fast functionality recovery upon damages. However, most touch pads have been developed based on stiff and brittle electrodes with the lack of important nature of self-healing. We developed polyzwitterion-clay nanocomposite hydrogels as the soft, stretchable and transparent ionic conductor with transmittance of 98.8% and fracture strain beyond 1500%, which could be used as a self-healing human-machine interactive touch pad with pressure sensitive adhesiveness on target substrates. A surface-capacitive touch system was adopted to sense a touched position. Finger positions were perceived during both point-by-point touch and continuous moving. Hydrogel touch pads were adhered to curved or flat insulators, with the high-resolution and self-healable input functions demonstrated by drawing, writing and play electrical games.